class WaiterDao:

    def serve(self, guest, manu):
        if manu.status == 2:
            print("{0}的菜已上完。".format(guest.name))
            print("点菜清单：{0}。".format(manu.name))
            manu.status = 3

    # 付款 
    def pay(self, guest, manu):
        if manu.status == 4:
            print("{0}已付款{1}。".format(guest.name, manu.price))
            manu.status = 1
